EP 0488505 A1 19920603 - Frequency-divider circuit.
Title (en)
Frequency-divider circuit.
Title (de)
Frequenzteilerschaltung.
Title (fr)
Circuit diviseur de fréquence.
Publication
Application
Priority
JP 32426190 A 19901126
Abstract (en)
Judgment means (104,106,108) provides a first output alternating signal to a DIVIDED 2 frequency-divider (111) and also a frequency-division control signal at a first level to operate the DIVIDED 2 frequency-divider, when a first input alternating signal is applied to an input terminal. The first output alternating signal frequency divided by the DIVIDED 2 frequency divider is applied to an NOR gate (116), to which a first gate control signal is applied from the judgment means so as to allow the frequency divided first output alternating signal to pass the NOR gate. When a second input alternating signal is applied to the input terminal, the judgment means provides the frequency-division control signal at a second level to the DIVIDED 2 frequency-divider which, in turn, provides a second gate control signal to the NOR gate. At this time, the judgment means also provides a second output alternating signal to the NOR gate. The NOR gate with the second gate control signal applied thereto passes the second output alternating signal therethrough. The first and second input alternating signals alternate about different reference levels. <IMAGE>
IPC 1-7
IPC 8 full level
H03K 23/64 (2006.01); H03K 19/173 (2006.01); H03K 21/02 (2006.01); H03K 23/66 (2006.01)
CPC (source: EP US)
H03K 19/1732 (2013.01 - EP US); H03K 21/02 (2013.01 - EP US); H03K 23/667 (2013.01 - EP US)
Citation (search report)
- [A] US 4820993 A 19890411 - COHEN EARL T [US], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 5, no. 91 (E-61)(763) 13 June 1981 & JP-A-56 037 732 ( NIPPON DENSHIN DENWA KOSHA ) 11 April 1981
- [A] SYSTEMS COMPUTERS CONTROLS vol. 7, no. 2, 1 March 1976, WASHINGTON , US pages 52 - 59; NORIO TAYAMA ET. AL.: 'PROPOSAL FOR A TERNARY LOGIC SYSTEM'
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0488505 A1 19920603; EP 0488505 B1 19960612; DE 69120218 D1 19960718; DE 69120218 T2 19961128; JP 2611542 B2 19970521; JP H04192721 A 19920710; US 5214681 A 19930525
DOCDB simple family (application)
EP 91308604 A 19910920; DE 69120218 T 19910920; JP 32426190 A 19901126; US 78822791 A 19911105